Heater fan



FIG. 1 is a front, left, perspective view of a heater fan showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a left side perspective view thereof;

FIG. 5 is a right side perspective view thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view thereof. 

The ornamental design for a heater fan, as shown. 